An Analytical Reference Standard
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Exempt Preparation(s)
43500Clonitazene (exempt preparation)
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Clonitazene

Item No. 29642

Restricted Product (Schedule I)
Product Insert (PDF)GC-MS (PDF)Safety Data Sheet (SDS) (PDF)
Synonyms
Synonyms
  • C193901
Technical Information
Formal Name
2-[(4-chlorophenyl)methyl]-N,N-diethyl-5-nitro-1H-benzimidazole-1-ethanamine
CAS Number
3861-76-5
Molecular Formula
C20H23ClN4O2
Formula Weight
386.9
Purity
≥98%
Formulation
A crystalline solid
Solubility(Learn about Variance in Solubility)
DMF: 25 mg/mlDMF:PBS (pH 7.2) (1:1): 0.5 mg/mlDMSO: 20 mg/mlEthanol: 10 mg/mlMethanol: 1 mg/ml
λmax
243, 309 nm
SMILES
ClC(C=C1)=CC=C1CC2=NC3=CC([N+]([O-])=O)=CC=C3N2CCN(CC)CC
InChi Code
InChI=1S/C20H23ClN4O2/c1-3-23(4-2)11-12-24-19-10-9-17(25(26)27)14-18(19)22-20(24)13-15-5-7-16(21)8-6-15/h5-10,14H,3-4,11-13H2,1-2H3
InChi Key
GPZLDQAEBHTMPG-UHFFFAOYSA-N
Regulatory Information
DEA Schedule
I
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
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    Product Description

    Clonitazene (Item No. 29642) is an analytical reference standard categorized as an opioid.1 Clonitazene has analgesic effects in mice.2 Clonitazene is regulated as a Schedule I compound in the United States. This product is intended for research and forensic applications.

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Vandeputte, M.M., Van Uytfanghe, K., Layle, N.K., et al. Synthesis, chemical characterization, and µ-opioid receptor activity assessment of the emerging group of "nitazene" 2-benzylbenzimidazole synthetic opioids. ACS Chem. Neurosci. 12(7), 1241-1251 (2021).

    2. Ujváry, I., Christie, R., Evans-Brown, M., et al. DARK classics in chemical neuroscience: Etonitazene and related benzimidazoles. ACS Chem. Neurosci. 12(7), 1072-1092 (2021).

    Product Citations

    Kozell, L.B., Eshelman, A., J., Wolfrum, K.M., et al. Pharmacologic characterization of substituted nitazenes at μ, κ, and Δ opioid receptors suggests high potential for toxicity. J. Pharmacol. Exp. Ther. 389(2), 219-228 (2024).

    Vandeputte, M.M., Van Uytfanghe, K., Layle, N.K., et al. Synthesis, chemical characterization, and µ-opioid receptor activity assessment of the emerging group of "nitazene" 2-benzylbenzimidazole synthetic opioids. ACS Chem. Neurosci. 12(7), 1241-1251 (2021).